Growing up my Mom refused to make us casseroles of any type. She believed (from childhood experience) that casseroles were just leftovers covered under a layer of shredded cheese. Until I moved out and went to college I thought the same thing.
However after my experiences having dinner at my friends houses and other extended family I've actually gotten to try all sorts of casseroles... The Good- Broc, cheese & rice. The Bad- anything made with Campbell's Tomato soup or topped with crushed saltines. And the Ugly- Tuna Noodle casserole. :)